Procedure GMP::Column::SetLowerBoundMulti(GMP, binding, column, value)

# GMP::Column::SetLowerBoundMulti¶

The procedure GMP::Column::SetLowerBoundMulti changes the lower bound of a group of columns, belonging to a variable, in the generated mathematical program.

GMP::Column::SetLowerBoundMulti(
GMP,            ! (input) a generated mathematical program
binding,        ! (input) an index binding
column,         ! (input) a variable expression
value           ! (input) a numerical expression
)


## Arguments¶

GMP

An element in AllGeneratedMathematicalPrograms.

binding

An index binding that specifies and possibly limits the scope of indices.

column

A variable that, combined with the binding domain, specifies the columns.

value

The new lower bound for each column, defined over the binding domain binding.

## Return Value¶

The procedure returns 1 on success, and 0 otherwise.

Note

If the variable has a unit then value should have the same unit. If value has no unit then you should multiply it by the column scale, as returned by the function GMP::Column::GetScale. See GMP::Column::SetLowerBound for an example with units.

## Example¶

To set the lower bounds of variable x(i) to lb(i) we can use:

for (i) do
GMP::Column::SetLowerBound( myGMP, x(i), lb(i) );
endfor;


It is more efficient to use:

GMP::Column::SetLowerBoundMulti( myGMP, i, x(i), lb(i) );


If we only want to set the lower bounds of those x(i) for which dom(i) is unequal to zero, then we use:

GMP::Column::SetLowerBoundMulti( myGMP, i | dom(i), x(i), lb(i) );